Yes, OBD II sensor will narrow down the problem to 5 or 6 possibilities. The only correct diagnose is supposed to be at the Dealer who has a factory diagnosing machine. Even that in my case was a wrong diagnosis. Dealer said I have to replace just the two secondary chains (in a Timing chain issue), secondary tensioners and the guides. The problem was the main guide and tensioner. My scanner gave 7 possibilities from a car specific code. Dealer had to fail Emissions 2 times but DEQ would not pardon the vehicle. I Had a white elephant at home with no emissions and no registered tags.
The symptoms above directs me to my conclusion as I did a thorough research even with Nissan USA. After market 2 sensors would not undo the SES light and only the OEM parts did the trick.